crump vs thump

crump

noun
  • The sound of a muffled explosion. 

verb
  • To produce such a sound. 

  • (of one's health) to decline rapidly (but not as rapidly as crash). 

adj
  • Hard or crusty; dry baked 

thump

noun
  • A blow that produces a muffled sound. 

  • The sound of such a blow; a thud. 

verb
  • To throb with a muffled rhythmic sound. 

  • To hit (someone or something) as if to make a thump. 

  • To cause to make a thumping sound. 

  • To thud or pound. 

How often have the words crump and thump occurred in a corpus of books? (source: Google Ngram Viewer )